AM186 Datasheet, PDF (92/112 Pages) Advanced Micro Devices – High-Performance, 80C186- and 80C188-Compatible, 16-Bit Embedded Microcontrollers with RAM

Switching Characteristics over Commercial and Industrial Operating Ranges
Clock (25 MHz)
Preliminary
Parameter
25 MHz
No. Symbol Description
Min
Max Unit
CLKIN Requirements for Times One Mode
36
t_CKIN X1 Period^(a)
40
60
ns
37
t_CLCK X1 Low Time (1.5 V)^(a)
15
ns
38
t_CHCK X1 High Time (1.5 V)^(a)
15
ns
39
t_CKHL X1 Fall Time (3.5 to 1.0 V)^(a)
5
ns
40
t_CKLH X1 Rise Time (1.0 to 3.5 V)^(a)
5
ns
CLKIN Requirements for Divide by Two Mode
36
t_CKIN X1 Period^(a)
20
33
ns
37
t_CLCK X1 Low Time (1.5 V)^(a)
10
ns
38
t_CHCK
39
t_CKHL
40
t_CKLH
CLKOUT Timing
42
t_CLCL
T ⁴³
t_CLCH
44
t_CHCL
45
t_CH1CH2
F ⁴⁶
t_CL2CL1
61
t_LOCK
69
t_CICOA
70
t_CICOB
X1 High Time (1.5 V)^(a)
X1 Fall Time (3.5 to 1.0 V)^(a)
X1 Rise Time (1.0 to 3.5 V)^(a)
CLKOUTA Period
CLKOUTA Low Time (C_L=50 pF)
CLKOUTA High Time (C_L=50 pF)
CLKOUTA Rise Time (1.0 to 3.5 V)
CLKOUTA Fall Time (3.5 to 1.0 V)
Maximum PLL Lock Time
X1 to CLKOUTA Skew
X1 to CLKOUTB Skew
10
40
0.5t_CLCL – 2 = 18
0.5t_CLCL – 2 = 18
ns
5
ns
5
ns
ns
ns
ns
3
ns
3
ns
1
ms
20
ns
34
ns
A ^Notes:
All timing parameters are measured at V_CC/2 with 50 pF loading on CLKOUTA, unless otherwise noted. All
output test conditions are with C_L=50 pF. For switching tests, V_IL=0.3 V and V_IH =V_CC–0.3 V.
a The specifications for CLKIN are applicable to the Divide by Two and Times One modes.
The Times One mode should be used for operations from 16 MHz to 20 MHz. The Times Four mode should
D ^{R be used for operations above 20 MHz.}
92
Am186^TMER and Am188^TMER Microcontrollers Data Sheet